mcs/class/corlib/Test/System.IO/StringWriterTest.cs

   1 //
   2 // System.IO.StringWriter
   3 //
   4 // Authors:
   5 //      Marcin Szczepanski (marcins@zipworld.com.au)
   6 //      Ben Maurer <bmaurer@users.sourceforge.net>
   7 //      Sebastien Pouliot  <sebastien@ximian.com>
   8 //
   9 // Copyright (C) 2004 Novell (http://www.novell.com)
  10 //
  11
  12 using NUnit.Framework;
  13 using System.IO;
  14 using System;
  15 using System.Globalization;
  16 using System.Text;
  17
  18 namespace MonoTests.System.IO {
  19
  20 [TestFixture]
  21 public class StringWriterTest : Assertion {
  22         public void TestConstructors() {
  23                 StringBuilder sb = new StringBuilder("Test String");
  24
  25                 StringWriter writer = new StringWriter( sb );
  26                 AssertEquals( sb, writer.GetStringBuilder() );
  27         }
  28
  29         public void TestCultureInfoConstructor() {
  30
  31                 StringWriter writer = new StringWriter(CultureInfo.InvariantCulture);
  32                 AssertNotNull( writer.GetStringBuilder() );
  33
  34                 AssertEquals( String.Empty, writer.ToString() );
  35
  36                 writer.Write( 'A' );
  37                 AssertEquals( "A", writer.ToString() );
  38
  39                 writer.Write( " foo" );
  40                 AssertEquals( "A foo", writer.ToString() );
  41
  42
  43                 char[] testBuffer = "Test String".ToCharArray();
  44
  45                 writer.Write( testBuffer, 0, 4 );
  46                 AssertEquals( "A fooTest", writer.ToString() );
  47
  48                 writer.Write( testBuffer, 5, 6 );
  49                 AssertEquals( "A fooTestString", writer.ToString() );
  50
  51                 writer = new StringWriter(CultureInfo.InvariantCulture);
  52                 writer.Write(null as string);
  53                 AssertEquals( "", writer.ToString() );
  54         }
  55
  56         public void TestWrite() {
  57                 StringWriter writer = new StringWriter();
  58
  59                 AssertEquals( String.Empty, writer.ToString() );
  60
  61                 writer.Write( 'A' );
  62                 AssertEquals( "A", writer.ToString() );
  63
  64                 writer.Write( " foo" );
  65                 AssertEquals( "A foo", writer.ToString() );
  66
  67
  68                 char[] testBuffer = "Test String".ToCharArray();
  69
  70                 writer.Write( testBuffer, 0, 4 );
  71                 AssertEquals( "A fooTest", writer.ToString() );
  72
  73                 writer.Write( testBuffer, 5, 6 );
  74                 AssertEquals( "A fooTestString", writer.ToString() );
  75
  76                 writer = new StringWriter ();
  77                 writer.Write(null as string);
  78                 AssertEquals( "", writer.ToString() );
  79
  80         }
  81
  82         public void TestNewLine() {
  83
  84                 StringWriter writer = new StringWriter();
  85
  86                 writer.NewLine = "\n\r";
  87                 AssertEquals ("NewLine 1", "\n\r", writer.NewLine);
  88
  89                 writer.WriteLine ("first");
  90                 AssertEquals ("NewLine 2", "first\n\r", writer.ToString());
  91
  92                 writer.NewLine = "\n";
  93                 AssertEquals ("NewLine 3", "first\n\r", writer.ToString());
  94
  95                 writer.WriteLine ("second");
  96                 AssertEquals ("NewLine 4", "first\n\rsecond\n", writer.ToString());
  97
  98         }
  99
 100         public void TestWriteLine() {
 101
 102                 StringWriter writer = new StringWriter();
 103                 writer.NewLine = "\n";
 104
 105                 writer.WriteLine ("first line");
 106                 writer.WriteLine ("second line");
 107
 108                 AssertEquals ("WriteLine 1", "first line\nsecond line\n", writer.ToString ());
 109                 writer.Close ();
 110         }
 111
 112         public void TestGetStringBuilder() {
 113
 114                 StringWriter writer = new StringWriter ();
 115                 writer.Write ("line");
 116                 StringBuilder builder = writer.GetStringBuilder ();
 117                 builder.Append (12);
 118                 AssertEquals ("GetStringBuilder 1", "line12", writer.ToString ());
 119                 writer.Write ("test");
 120                 AssertEquals ("GetStringBuilder 2", "line12test", builder.ToString ());
 121         }
 122
 123         public void TestClose() {
 124
 125                 StringWriter writer = new StringWriter ();
 126                 writer.Write ("mono");
 127                 writer.Close ();
 128
 129                 try {
 130                         writer.Write ("kicks ass");
 131                         Fail ("Close 1");
 132                 } catch (Exception e) {
 133                         AssertEquals ("Close 2", typeof (ObjectDisposedException), e.GetType ());
 134                 }
 135
 136                 AssertEquals ("Close 3", "mono", writer.ToString ());
 137                 writer.Flush ();
 138                 StringBuilder builder = writer.GetStringBuilder ();
 139                 AssertEquals ("Close 4", "mono", builder.ToString ());
 140
 141                 builder.Append (" kicks ass");
 142                 AssertEquals ("Close 5", "mono kicks ass", writer.ToString ());
 143         }
 144
 145         public void TestExceptions () {
 146
 147                 try {
 148                         StringWriter writer = new StringWriter (null as StringBuilder);
 149                         Fail();
 150                 } catch (Exception e) {
 151                         AssertEquals ("Exceptions 1", typeof (ArgumentNullException), e.GetType ());
 152                 }
 153                 {
 154                 StringWriter writer = new StringWriter (null as IFormatProvider);
 155                 }
 156                 try {
 157                         StringWriter writer = new StringWriter (null as StringBuilder, null as IFormatProvider);
 158                         Fail ();
 159                 } catch (Exception e) {
 160                         AssertEquals ("Exceptions 2", typeof (ArgumentNullException), e.GetType ());
 161                 }
 162         }
 163
 164         [Test]
 165         // strangely this is accepted [ExpectedException (typeof (ArgumentNullException))]
 166         public void WriteString_Null ()
 167         {
 168                 StringWriter writer = new StringWriter ();
 169                 writer.Write (null as String);
 170         }
 171
 172         [Test]
 173         [ExpectedException (typeof (ArgumentNullException))]
 174         public void WriteChars_Null ()
 175         {
 176                 StringWriter writer = new StringWriter ();
 177                 writer.Write (null, 0, 0);
 178         }
 179
 180         [Test]
 181         [ExpectedException (typeof (ArgumentOutOfRangeException))]
 182         public void WriteChars_IndexNegative ()
 183         {
 184                 char[] c = new char [2] { 'a', 'b' };
 185                 StringWriter writer = new StringWriter ();
 186                 writer.Write (c, -1, 0);
 187         }
 188
 189         [Test]
 190         [ExpectedException (typeof (ArgumentOutOfRangeException))]
 191         public void WriteChars_CountNegative ()
 192         {
 193                 char[] c = new char [2] { 'a', 'b' };
 194                 StringWriter writer = new StringWriter ();
 195                 writer.Write (c, 0, -1);
 196         }
 197
 198         [Test]
 199         [ExpectedException (typeof (ArgumentException))]
 200         public void WriteChars_IndexOverflow ()
 201         {
 202                 char[] c = new char [2] { 'a', 'b' };
 203                 StringWriter writer = new StringWriter ();
 204                 writer.Write (c, Int32.MaxValue, 0);
 205         }
 206
 207         [Test]
 208         [ExpectedException (typeof (ArgumentException))]
 209         public void WriteChars_CountOverflow ()
 210         {
 211                 char[] c = new char [2] { 'a', 'b' };
 212                 StringWriter writer = new StringWriter ();
 213                 writer.Write (c, 0, Int32.MaxValue);
 214         }
 215
 216         [Test]
 217         public void Disposed_Encoding ()
 218         {
 219                 StringWriter writer = new StringWriter ();
 220                 writer.Close ();
 221                 AssertNotNull ("Disposed-Encoding", writer.Encoding);
 222         }
 223
 224         [Test]
 225         public void Disposed_DoubleClose ()
 226         {
 227                 StringWriter writer = new StringWriter ();
 228                 writer.Close ();
 229                 writer.Close ();
 230         }
 231
 232         [Test]
 233         public void Disposed_GetStringBuilder ()
 234         {
 235                 StringWriter writer = new StringWriter ();
 236                 writer.Write ("Mono");
 237                 writer.Close ();
 238                 AssertNotNull ("Disposed-GetStringBuilder", writer.GetStringBuilder ());
 239         }
 240
 241         [Test]
 242         public void Disposed_ToString ()
 243         {
 244                 StringWriter writer = new StringWriter ();
 245                 writer.Write ("Mono");
 246                 writer.Close ();
 247                 AssertEquals ("Disposed-ToString", "Mono", writer.ToString ());
 248         }
 249
 250         [Test]
 251         [ExpectedException (typeof (ObjectDisposedException))]
 252         public void Disposed_WriteChar ()
 253         {
 254                 StringWriter writer = new StringWriter ();
 255                 writer.Close ();
 256                 writer.Write ('c');
 257         }
 258
 259         [Test]
 260         [ExpectedException (typeof (ObjectDisposedException))]
 261         public void Disposed_WriteString ()
 262         {
 263                 StringWriter writer = new StringWriter ();
 264                 writer.Close ();
 265                 writer.Write ("mono");
 266         }
 267
 268         [Test]
 269         [ExpectedException (typeof (ObjectDisposedException))]
 270         public void Disposed_WriteChars ()
 271         {
 272                 char[] c = new char [2] { 'a', 'b' };
 273                 StringWriter writer = new StringWriter ();
 274                 writer.Close ();
 275                 writer.Write (c, 0, 2);
 276         }
 277 }
 278
 279 }